Please Answer all questions 12. Glacial Meltwater - depositional or erosional? W
ID: 119905 • Letter: P
Question
Please Answer all questions
12. Glacial Meltwater - depositional or erosional? Why or why not? What about "eskers"? 13. For the slope modeling activity, your group was responsible for determining the angle of the model for comparison across the group. Then, when discussing Aeolian formations e talked about dune formation and how the dune would begin to collapse around 34°which is considered the "angle of What characteristics of a material can determine the angle of repose? Do you think there any remediation methods that could help increase repose What is the "angle of repose"? Is it the same for all granular material? How is this applicable to the slope model activity? the angle of repose & decrease slope failures? 14. Topography influenced by fluvial & glacial systems have multiple physical similarities & differences. These features provide both benefits & concerns to the communities that have settled in these regions. Compare & contrast the physical features of fluvial & glacial landscapes; What are some of the benefits& concerns to settling in these regions? What role does the water cycle play in these two systems?Explanation / Answer
12. Glacier is a dense mass of ice that moves constantly by its own weight. A glacier moves very slowly. Glaciers erode. It erodes the land and rocks on its way. Plucking and Abrasion are the ways glaciers erode. When the glaciers melt, it deposits the sediment material. So Glacier melt is depositional. The sediment deposited by a glacier is called as till.
Esker:
Eskers are resultant of running water in, on or under the glacier. Summer can cause glacier melting. The melted water accumulates beneath the glacier and flows beneath the glacier. Boulders, blocks and rock debris are carried away by the eskers. They get deposited in the valleys, once the glacier melts completely they appear on the surface like ridges. These ridges are termed as Eskers. So eskers are depositions by glacier.
13. Angle of repose:
It’s the maximum slope, measured upward from the horizontal in degrees, at which all the loose solid material will remain without sliding downward. This is the angle at which the slope becomes unstable and the material begin to slide down.
Factors affecting the Angle of repose:
• Size and angularity of particles affect the angle of repose. Fine material forms a shallower pile and forms a smaller angle of repose than coarse grains. Greater angularity results more inter granular friction and interlocking of particles, contributing to greater angle of repose.
• Water content affects the cohesiveness. If water is added to the particles, they bind together and builds shear strength. So moist particles has higher angle of repose than dry particles. But too much water reduces the cohesion and can produces slurry.
As the particle size increases, the angle of repose decreases. Spherical particles have smaller angle of repose when compared to irregular particles. Fine particles have higher angle of repose.